With news of Pippa's possible engagement, we look at the friendly fashion rivalry between the Middleton sisters.

Equestrian Moment

Equestrian Moment

Ever since the royal wedding thrust the McQueen-clad Middleton sisters into the fashion spotlight — and the maid of honor almost upstaged the bride — it seems as if Pippa and Kate have been engaged in a friendly fashion rivalry of sorts. The sisters, who are less than two years apart, might both be known for their gleaming white smiles (so American, those teeth!) and their loyalty to High Street shops (L.K. Bennett and Reiss are favorites), but each has her own distinct style. While older sister Kate's princess attire consists mostly of smart, put-together outfits, Pippa adheres to low-key casualwear. Now that the world is the sisters' catwalk, we thought it a good time to take a look at their best postnuptial style moments.

In a Stetson hat, belt buckle, and jeans, Kate goes into full cowgirl mode for the rodeo in Calgary. On the other side of the Atlantic, Pippa channels the riding spirit with her scrunched brown leather boots.